Hille, E <br/><br/>
Ordinary differential equations in the complex domain 
E. Hille 
 - New York  John Wiley & Sons  1976 
 - xi  484 
 - Pure & applied mathematics .
<br/><br/><label>ISBN: </label>0471399647 
<br/><br/><label>Dewey Class. No.: </label>10.01  / HILL